Block Version History

| Version Number | Proposed In | Released | Summary | |--|--|---| |||Aug 2017| Bitcoin Cash hard fork.| |4|BIP-0065| Nov 2015
Bitcoin Core 0.11.2| Added support for OP_CHECKLOCKTIMEVERIFY opcode.| |3|BIP-0066|Jul 2015
Bitcoin Core 0.10.0| Added enforcement of DER encoding of all ECDSA signatures in new blocks.| |2|BIP-0034|Sep 2012
Bitcoin Core 0.7.0| Added the block height within the block coinbase.| |1||Jan 2009|The format used in the genesis block.|